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Female Tools  ·  JSON Formatter

JSON Formatter & Validator

Paste JSON to format, validate, or minify it. Syntax highlighted output with error detection.

This json formatter helps developers, QA engineers, and students turn cramped or broken JSON into something readable. Paste any object or array and instantly format it with adjustable indentation, minify it down to a single line, or validate it and see exactly where a parse error occurs. Output is syntax highlighted by type — keys, strings, numbers, booleans, and null are each color-coded — so nested structures are easy to scan. A stats bar reports key counts, nesting depth, and byte savings after minifying, which is handy when trimming API payloads or config files. Everything runs client-side using the browser's native JSON parser, so pasted data, including sensitive API responses, never leaves your device or touches a server.

Input JSON
Output
How to Use JSON Formatter
  1. Paste your JSON into the input panel.
  2. Choose your indent width (2 spaces, 4 spaces, or tab).
  3. Click "Format" to pretty-print, "Minify" to compress, or "Validate" to check it.
  4. Review the error message if the JSON is invalid.
  5. Copy the result or click the .json button to download it.
Frequently Asked Questions
Paste raw JSON into the JSON Formatter and click Format. The tool indents, validates, and syntax-highlights your JSON. You can also minify to remove all whitespace.
The formatter validates as you type and shows the exact line and position of any syntax error.
Formatting adds indentation for readability. Minifying removes all whitespace to produce the smallest possible string for APIs and production code.